Locks



J. A. BANHAM Dec. 30, 1969 LOCKS Filed March 3, 1967 IAWEW jaw flumqvfiwmv w X United States Patent 3,486,351 LOCKS John Anthony Banham,London, England, assignor to Banhams Patent Locks Limited, London,England, a company of Great Britain and Northern Ireland Filed Mar. 3,1967, Ser. No. 620,297 Claims priority, application Great Britain, Mar.7, 1966,

66 Int. Cl. E051) i/l0, 63/00, 65/06 US. Cl. 70104 7 Claims ABSTRACT OFTHE DISCLOSURE This invention relates to locks for hinged closures suchas pivoted doors and casement windows.

In one known form of lock for such hinged closures, a lock body securedto one part has a detent displaceable parallel to the closure plane toseat in a slot in the other part or in a slotted member of the locksecured to a frame of said other part. Such arrangements require arelatively unrestricted space for their disposition and operation. Saidother part must also have an appreciable depth and its material bereadily worked if a slot is to be formed in it and if alternatively aslotted member is fitted to the surface of said other part by suchconventional means as surface screws it can easily be removed by anintruder.

According to the present invention, there is provided a lock for a pairof mutually hinged parts wherein bolt and peg members are provided forattachment to the respective parts, an abutment element intermediate thelength of the peg member providing an engagement surface for the boltmember and a key mechanism being arranged to displace the bolt memberinto and out of engagement with the peg member.

More particularly, the invention may provide a lock for a hingedclosure, such as a casement window, comprising a fixed part and amovable part hinged thereto, the lock including a peg adapted to befixed to one part to project from the plane thereof, and a lock bodyadapted to be secured to the other part so as to be locatable over thepeg and receive a projecting portion thereof in a recess, the lock bodyincluding a bolt movable in the plane of its supporting part by akey-operated mechanism to engage the peg which is provided with at leastone shoulder or like abutment on said projecting portion to form anelement for said engagement of the bolt preventing relative openingmovement of the parts.

Preferably, the bolt member has a U-form engagement region arranged toembrace the peg member while the peg itself may have its engagementsurface formed by a peripheral recess. This last feature is particularlyconvenient if the peg is to be screwed to its frame since its angularorientation is then unimportant.

One form of lock according to the present invention will be moreparticularly described with reference to the accompanying drawings,wherein:

FIG. 1 shows the lock mounted on a casement window,

FIG. 2 is a view of the rear face of the lock body with the backplateremoved,

FIG. 3 is a sectional elevation on the line IHIII 3,486,351 PatentedDec. 30, 1969 in FIG. 2 and also shows the backplate and locking pin,and

FIGS. 4 and 5 are rear and plane elevations respectively of a modifiedform of lock body.

Referring to the drawing, the lock body comprises a die cast shell 2which carries a locking cylinder 4 of conventional nature. The lock bodyis secured to a hinged frame 6 of the window by screws 8 passing throughthe frame and into tapped blind holes 9 in the rear face of the shell.When the frame 6 is closed against fixed surrounding frame 20 to whichit is to be secured, the edge of the latter 'conceals the heads of thescrews 8. It is therefore impossible to remove the lock, when it isoperative without the use of force.

The rear face of the shell is closed by a backplate 10 and an innerrecess 12 thus covered by the backplate houses a bolt member 14 which isadjustably located in the recess by a pin 16 projecting from the lockingcylinder 4 into a lateral slot 18 of the member.

A peg 19 is secured to fixed frame 20 by a threaded shank 24 to projectfrom the plane of that frame and is located thereon to be able to passthrough an aperture 26 in the backplate 10 to a bore 28 in the shell 2.One end of the bolt member 14 has a central slot locatable over the bore28 and said end defines a U-form engagement portion 22 for the peg.

As the cylinder mechanism is rotated by manipulation of a key insertedfrom the front of the lock, the pin 16 pivots with the cylinder andcauses the member 14 to slide along the recess 12. The peg has aconcentric necked portion 30 that is in register with the plane of therecess 12 when the hinged frame 6 is closed and operation of the lockingcylinder will therefore raise the bolt member 14 so that its U-formportion embraces the necked portion of the peg. The member 14 is thenengaged by the shoulder of the peg neck 30 and the frame 6 is locked inits closed position against the fixed frame 20.

It will be appreciated that the above-described embodiment can bemodified within the scope of the present invention. For example, FIGS. 4and 5 illustrate an alternative form of body shell 2a having a rabbet orstep 32 offset from the plane containing the axes of the tapped holes 9.Backplate 10a has its outer face fiush with face 32a of this rabbet.When the lock body is mounted to its frame member 6, the inner angle ofthe step 32 is located against the outer edge of the member 6 so thatthe portion of the body shell overlapping the member 6 is brought closerto the face of the fixed frame member 20.

In a further modification shown in FIGS. 4 and 5, aperture 26 of thebackplate and bore 28 of the body shell are duplicated in the lowerregion of the shell. The bolt member has a second engagement portion 22ain this lower region and thus either of the bores 28 can receive the pegmember 19. This feature has the effect of allowing an asymmetricalconstruction, such as the rabbeted body shell, to be used in oppositelyhanded 1ocations with a similar relative disposition of the two separateparts of the lock.

What I claim and desire to secure by Letters Patent is:

1. A lock for a pair of mutually hinged parts and comprising, incombination, a peg member adapted to be secured to one of said parts toproject from it in the direction of initial relative opening movementbetween said parts, a lock body securable to said other part to belocatable over the peg member, an abutment element being provided on aportion of the peg member projecting from said one part, respectivereceiving recesses being formed in the lock body towards opposite endsthereof and each able to receive said projecting portion of the pegmember, a bolt member being displaceably mounted to the lock bodybetween said recesses and a key-operated mechanism being secured to saidbody centrally of the length of said body to move the bolt memberselectively towards either end of said body to engage said abutmentelement in the selected one of said recesses and prevent relativeopening movement between said hinged parts.

2. A lock according to claim 1 wherein a plurality of engageableelements are provided on said bolt member for alternative engagementlocations.

3. A lock according to claim 1 wherein a rabbet is formed on a face ofthe lock body abutting said other part to which the body is secured, theinner angle of saidrabbet being seatable against an edge of said otherpart whereby the body overlaps said edge and the overlapping portion ofsaid face can be brought into close proximity to said one part.

4. A lock according to claim 1 wherein a peripheral recess is formed onsaid projecting portion of the peg member to provide said abutmentelement for the bolt member.

5. A lock according to claim 4 wherein the peg member further comprisesa screwed shank contiguous to said projecting portion and concentricwith said periph' eral recess, the member being securable by said shankto its associated one of the hinged parts.

body and eccentrically to its axis of rotation, said ele ment extendinginto said slot to displaceably engage the bolt member.

References Cited UNITED STATES PATENTS 473,888 4/1892 Saxton 292-l75487,153 11/1892 Orth 70-156 3,222,897 12/1965 Du Shane 70--97 183,03510/1876 Young 70l34 MARVIN A. CHAMPION, Primary Examiner ROBERT L.WOLFE, Assistant Examiner US. Cl. X.R.

